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Ebyte E80 Hat - LR1121 2025-10-01

A quick hat for Ebyte's LR1121 E80 module.

Source available on GitHub.

Screenshot of the PCB layout. Picture of the hat on top of a Pi Zero, showing the radio module and two antenna connectors for Sub-GHz and 2.4GHz.

meshtasticd config

# https://mesh.9net.org/hardware/e80-lr1121-zero-hat/

Lora:
  Module: lr1121
  CS: 8
  Reset: 23
  IRQ: 24
  Busy: 25
  DIO3_TCXO_VOLTAGE: 1.8

  rfswitch_table:
    pins:
      - DIO5
      - DIO6
    MODE_STBY:
      - LOW
      - LOW
    MODE_RX:
      - LOW
      - HIGH
    MODE_TX:
      - HIGH
      - HIGH
    MODE_TX_HP:
      - HIGH
      - LOW
    MODE_TX_HF:
      - LOW
      - LOW